Results and recurrence of pigmented villonodular synovitis of the ankle: does diffuse PVNS with extra-articular extension tend to recur more often? - Guo, QinWei; Shi, WeiLi; Jiao, Chen; Xie, Xing; Jiang, Dong; Hu, YueLin (Knee Surgery, Sports Traumatology, Arthroscopy, 2018)